codex: update model/effort and refresh system skills

.codex/skills/.system/plugin-creator/scripts/identifier_validation.py

@@ -0,0 +1,20 @@
+"""Validate plugin and marketplace identifiers before using them in commands."""
+
+import re
+
+
+def validate_plugin_identifier(plugin_name: str) -> None:
+    if re.fullmatch(r"[A-Za-z0-9_-]+(?:\.[A-Za-z0-9_-]+)*", plugin_name) is None:
+        raise ValueError(
+            "Plugin name may only contain ASCII letters, digits, `.`, `_`, and `-`, "
+            "with dots separating non-empty name segments."
+        )
+
+
+def validate_marketplace_name(marketplace_name: str) -> None:
+    if not marketplace_name:
+        raise ValueError("Marketplace name must include at least one letter or digit.")
+    if re.fullmatch(r"[A-Za-z0-9_-]+", marketplace_name) is None:
+        raise ValueError(
+            "Marketplace name may only contain ASCII letters, digits, `_`, and `-`."
+        )